August 1, 2019

Last day of measurements in the PP cave

Image of ice crystals near the bottom of the borehole where we have the very hard breaks. The shade of the core catchers can be seen together with the ‘rips’ between the crystal above the core catcher.

The last measurements of ice crystals where made in the PP cave. Both ice crystal size and orientation from the thin slices of ice seen in polarized light (right) and from the Large Area Scanning Microscope(left) are being observed. The amount of measurements already made in the EGRIP core makes it the best investigated deep ice core. This is very impressive, and a great WELL DONE is in its place both to the present team Ilka, Steven and David and to all the previous teams at EGRIP.

What we did during the day:

1. PP measurements of the last thin sections
2. Packing in the cfa cabin and the surface program tents
3. Calibration of Picarro in Drone tent
4. Working on the radar data
5. Test of L-band radar
6. Work on the Rover
7. Successfully melting cores on the Lisa box.
8. Cleaning up in camp
9. Maintaining skidoos
10. Old deep drilling cable up of drill trench and new cable down
11. Finalized the documentation of the frozen food in cooks freezer
12. Snow on floors in the carpenter and mechanic garages
13. Snow blowed around the dome
14. Opening of the balloon trench in the clean snow area
15. Evening visit to the shear valley

EGRIP population is 23

Weather: Wind 10 kts all day. Wind direction SW all day. Sunny broken overcast with temperatures between -11 °C and -1 °C.

FL, Dorthe Dahl-Jensen